Research Article |
Corresponding author: Hong-Wei Chen ( hongweic@scau.edu.cn ) Academic editor: Vera Silva
© 2017 Yi-Qin Liu, Qing-Song Gao, Hong-Wei Chen.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Liu Y-Q, Gao Q-S, Chen H-W (2017) The genus Scaptodrosophila Duda part I: the brunnea species group from the Oriental Region, with morphological and molecular evidence (Diptera, Drosophilidae). ZooKeys 671: 87-118. https://doi.org/10.3897/zookeys.671.11275
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Seven new species of the Scaptodrosophila brunnea species group are described from east Asia: S. maculata sp. n., S. melanogaster sp. n., S. nigricostata sp. n., S. nigripecta sp. n., S. obscurata sp. n., S. protenipenis sp. n. and S. rhina sp. n. Three known species, S. parabrunnea (Tsacas & Chassagnard), S. pressobrunnea (Tsacas & Chassagnard) and S. scutellimargo (Duda) are redescribed. A key to all the examined species in the brunnea group is provided. Species delimitations have been improved by integrating the DNA sequences with morphological information. The intra- and interspecific pairwise p-distances (proportional distance) are summarized. Some nucleotide sites with fixed status in the alignment of the COI sequences (664 nucleotide sites in length) are used as “pure” molecular diagnostic characters to delineate species in the brunnea group.
China, DNA barcoding, integrated taxonomy, Scaptodrosophila brunnea species group
To date, a total of 280 species (
The brunnea group includes eleven known species (
In the present study, seven new species from East Asian are described, and three known species are redescribed. DNA barcoding was conducted to evaluate morphological delimitation for the brunnea group, and for this, a total of 44 COI (mitochondrial cytochrome c oxidase I) gene sequences of the above-mentioned ten species mentioned above are determined (Table
Species | Sex | BOLD Process ID | GenBank accession number | Collection site |
---|---|---|---|---|
S. parabrunnea | ♂ | BDORS034-15 | KR070839 | Menglun, Mengla, Yunnan, China |
S. pressobunnea –1 | ♂ | BDORS013-15 | KR070841 | Nonggang, Chongzuo, Guangxi, China |
S. pressobunnea –2 | ♀ | BDORS012-15 | KR070840 | Nonggang, Chongzuo, Guangxi, China |
S. scutellimargo –1 | ♂ | BDORS001-15 | KR070847 | Jianfengling, Ledong, Hainan, China |
S. scutellimargo –2 | ♂ | BDORS002-15 | KR070854 | Iriomote Is., Okinawa, Japan |
S. scutellimargo –3 | ♀ | BDORS003-15 | KR070853 | Longdong, Guangzhou, Guangdong, China |
S. scutellimargo –4 | ♂ | BDORS004-15 | KR070852 | Liuxihe, Conghua, Guangdong, China |
S. scutellimargo –5 | ♂ | BDORS005-15 | KR070851 | Wangtianshu, Mengla, Yunnan, China |
S. scutellimargo –6 | ♂ | BDORS006-15 | KR070850 | Wangtianshu, Mengla, Yunnan, China |
S. scutellimargo –7 | ♂ | BDORS008-15 | KR070848 | Wangtianshu, Mengla, Yunnan, China |
S. scutellimargo –8 | ♂ | BDORS007-15 | KR070849 | Menglun, Mengla, Yunnan, China |
S. scutellimargo –9 | ♀ | BDORM026-17 | KY610504 | Jianfengling, Ledong, Hainan, China |
S. maculata sp. n. –1 | ♂ | BDORS030-15 | KR070820 | Menglun, Mengla, Yunnan, China |
S. maculata sp. n. –2 | ♂ | BDORS031-15 | KR070819 | Menglun, Mengla, Yunnan, China |
S. maculata sp. n. –3 | ♂ | BDORS033-15 | KR070821 | Wangtianshu, Mengla, Yunnan, China |
S. maculata sp. n. –4 | ♂ | BDORS032-15 | KR070818 | Wangtianshu, Mengla, Yunnan, China |
S. maculata sp. n. –5 | ♀ | BDORM027-17 | KY610505 | Menglun, Mengla, Yunnan, China |
S. maculata sp. n. –6 | ♀ | BDORM028-17 | KY610506 | Wangtianshu, Mengla, Yunnan, China |
S. melanogaster sp. n. –1 | ♂ | BDORS020-15 | KR070823 | Baihualing, Baoshan, Yunnan, China |
S. melanogaster sp. n. –2 | ♂ | BDORS018-15 | KR070824 | Baihualing, Baoshan, Yunnan, China |
S. melanogaster sp. n. –3 | ♂ | BDORS017-15 | KR070825 | Hesong, Menghai, Yunnan, China |
S. melanogaster sp. n. –4 | ♂ | BDORS019-15 | KR070822 | Hesong, Menghai, Yunnan, China |
S. melanogaster sp. n. –5 | ♂ | BDORS021-15 | KR070826 | Menglun, Mengla, Yunnan, China |
S. melanogaster sp. n. –6 | ♀ | BDORM029-17 | KY610507 | Hesong, Menghai, Yunnan, China |
S. nigricostata sp. n. –1 | ♂ | BDORS022-15 | KR070829 | Baihualing, Baoshan, Yunnan, China |
S. nigricostata sp. n. –2 | ♂ | BDORS023-15 | KR070827 | Baihualing, Baoshan, Yunnan, China |
S. nigricostata sp. n. –3 | ♂ | BDORS024-15 | KR070828 | Wangtianshu, Mengla, Yunnan, China |
S. nigricostata sp. n. –4 | ♀ | BDORM030-17 | KY610508 | Baihualing, Baoshan, Yunnan, China |
S. nigripecta sp. n. –1 | ♂ | BDORS027-15 | KR070831 | Wangtianshu, Mengla, Yunnan, China |
S. nigripecta sp. n. –2 | ♂ | BDORS028-15 | KR070832 | Wangtianshu, Mengla, Yunnan, China |
S. nigripecta sp. n. –3 | ♂ | BDORS029-15 | KR070830 | Wangtianshu, Mengla, Yunnan, China |
S. obscurata sp. n. –1 | ♂ | BDORS035-15 | KR070838 | Wangtianshu, Mengla, Yunnan, China |
S. obscurata sp. n. –2 | ♂ | BDORS039-15 | KR070834 | Wangtianshu, Mengla, Yunnan, China |
S. obscurata sp. n. –3 | ♂ | BDORS037-15 | KR070836 | Menglun, Mengla, Yunnan, China |
S. obscurata sp. n. –4 | ♀ | BDORS038-15 | KR070835 | Menglun, Mengla, Yunnan, China |
S. obscurata sp. n. –5 | ♂ | BDORS036-15 | KR070837 | Menglun, Mengla, Yunnan, China |
S. obscurata sp. n. –6 | ♂ | BDORS040-15 | KR070833 | Hesong, Menghai, Yunnan, China |
S. protenipenis sp. n. –1 | ♂ | BDORS014-15 | KR070843 | Baihualing, Baoshan, Yunnan, China |
S. protenipenis sp. n. –2 | ♂ | BDORS016-15 | KR070844 | Hesong, Menghai, Yunnan, China |
S. protenipenis sp. n. –3 | ♂ | BDORS015-15 | KR070842 | Hesong, Menghai, Yunnan, China |
S. protenipenis sp. n. –4 | ♀ | BDORM031-17 | KY610509 | Hesong, Menghai, Yunnan, China |
S. rhina sp. n. –1 | ♂ | BDORS025-15 | KR070845 | Menglun, Mengla, Yunnan, China |
S. rhina sp. n. –2 | ♂ | BDORS026-15 | KR070846 | Baihualing, Baoshan, Yunnan, China |
S. rhina sp. n. –3 | ♀ | BDORM032-17 | KY610510 | Menglun, Mengla, Yunnan, China |
The brunnea group flies were collected by net sweeping from tussocks and tree trunks near streams in forests. All the examined specimens were preserved in 75% ethanol. In the species descriptions, an asterisk * denotes a new record.
The specimens were first identified as of the brunnea group in light of morphology referring to
All sequences generated determined in this study were submitted to BOLD (The Barcode of Life Data system) and GenBank (Table
In addition, we also conducted a character-based species delimitation. In the sequence alignment, sites being fixed within the focal species but differing from the remaining species were manually selected as diagnostic sites (i.e. “pure” diagnostics;
A Mshot Camera was used to microphotograph all the photographs, illustrations and line drawings were processed with the software Adobe Photoshop 7.0 and Easy Paint Tool SAI Ver.1.0.0.
The type specimens were deposited in Department of Entomology, South China Agricultural University, Guangzhou, China (SCAU).
The alignment of the 44 COI sequences spanned 664 nucleotide sites in length, with 202 variable sites, among which 177 were parsimony informative. The inter- and intraspecific p-distances between species of the brunnea group are given in Table
The NJ tree was shown in Fig.
Summary of intra- and interspecific genetic distances in the brunnea group.
Species | N | Intraspecific genetic distances | Interspecific genetic distances |
---|---|---|---|
Min. / Max. / Mean ± SD | Min./ Max./ Mean ± SD | ||
S. parabrunnea | 1 | NA | 0.033/ 0.130/ 0.106 ± 0.031 |
S. pressobunnea | 2 | NA | 0.053/ 0.125/ 0.103 ± 0.026 |
S. scutellimargo | 9 | 0.002/ 0.024/ 0.009 ± 0.006 | 0.053/ 0.123/ 0.100 ± 0.014 |
S. maculata sp. n. | 6 | 0.000/ 0.005/ 0.002 ± 0.002 | 0.033/ 0.125/ 0.107 ± 0.015 |
S. melanogaster sp. n. | 6 | 0.000/ 0.027/ 0.017 ± 0.009 | 0.048/ 0.130/ 0.104 ± 0.019 |
S. nigricostata sp. n. | 4 | 0.002/ 0.008/ 0.005 ± 0.002 | 0.087/ 0.123/ 0.103 ± 0.008 |
S. nigripecta sp. n. | 3 | 0.003/ 0.008/ 0.005 ± 0.002 | 0.083/ 0.123/ 0.103 ± 0.009 |
S. obscurata sp. n. | 6 | 0.000/ 0.009/ 0.005 ± 0.003 | 0.087/ 0.123/ 0.108 ± 0.010 |
S. protenipenis sp. n. | 4 | 0.000/ 0.003/ 0.002 ± 0.001 | 0.048/ 0.128/ 0.100 ± 0.020 |
S. rhina sp. n. | 3 | 0.000/ 0.003/ 0.002 ± 0.002 | 0.083/ 0.117/ 0.103 ± 0.013 |
Drosophila brunnea species group Tsacas & Chassagnard, 1976: 96; Bock, 1982: 72.
Diagnosis (modified from
Description. Male and female: Head (Figs
Thorax (Figs
Abdomen (Figs
Male terminalia (Figs
Female terminalia (Figs
In the following individual species descriptions, only characters that depart from the above universal characters are provided for brevity.
Drosophila parabrunnea Tsacas & Chassagnard, 1976: 92.
CHINA: 1♂ (SCAU, No. 128342), Menglun, Mengla, Yunnan, 21°55'N, 101°16'E, alt. 570 m, 3–4.xi.2001, JJ Gao.
This species is very similar to S. maculata sp. n. in the patterns of abdominal tergites (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Measurements (in mm). BL = 3.07, ThL =1.47, WL =3.13, WW =1.13.
Indices: arb = 4/3, avd = 0.90, adf = 2.50, flw = 2.00, FW/HW = 0.43, ch/o = 0.05, prorb = 0.50, rcorb = 0.27, vb = 0.33, dcl = 0.45, presctl = 0.29, sctl = 0.80, sterno = 0.71, orbito = 0.50, dcp = 0.39, sctlp = 0.75, C = 2.05, 4c = 0.95, 4v = 2.00, 5x = 1.67, ac = 2.00, M = 0.52, C3F = 0.83.
China* (Yunnan), Indonesia (Java, Sumatra).
Drosophila pressobrunnea Tsacas & Chassagnard, 1976: 93.
CHINA: 1♂, 1♀ (SCAU, Nos 128246, 47), Nonggang, Chongzuo, Guangxi, 25°00'N, 106°51'E, alt. 230 m, 21–24.viii.2004, HW Chen.
This species is very similar to S. scutellimargo in the patterns of abdominal tergites (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements (range in 1♂, 1♀, in mm): BL = (2.89, 2.98), ThL = (1.29, 1.16), WL = (2.62, 2.36), WW = (1.02, 0.93).
Indices: arb = 4/3, avd = 0.89–0.94, adf = 3.60, flw = 2.00, FW/HW = 0.40–0.42, ch/o = 0.08–0.09, prorb = 0.65–0.68, rcorb = 0.26–0.35, vb = 0.83–1.00, dcl = 0.59, presctl = 0.38–0.45, sctl = 0.97–1.07, sterno = 0.68–0.70, orbito = 0.44–0.50, dcp = 0.38–0.44, sctlp = 0.79–1.10, C = 1.83–1.89, 4c = 1.33–1.40, 4v = 2.41–2.52, 5x = 1.80–1.90, ac = 3.27–3.50, M = 0.70–0.72, C3F = 0.88–0.90.
China* (Guangxi), India, Indonesia (Sumatra).
Drosophila scutellimargo Duda, 1924: 243; Tsacas & Chassagnard, 1976: 92.
CHINA: 4♀ (SCAU, Nos 128204–07), Longdong, Guangzhou, Guangdong, 12°19'N, 113°21'E, alt. 200 m, 1.v.2007, HW Chen; 2♀ (SCAU, Nos 128378–79), Tianluhu Park, Guangzhou, Guangdong, 23°13'N, 113°09'E, alt. 240 m, 6.ix.2015, YL Wang; 1♂ (SCAU, No. 128208), Liuxihe, Conghua, Guangdong, 23°26'N, 113°30'E, alt. 200 m, 12.v.2010, XY Xu; 9♂, 3♀ (SCAU, Nos 128189–200), Jianfengling, Ledong, Hainan, 18°41'N, 108°52'E, alt. 680–820 m, 23.iv.2007, XP Chen, JJ Gao; 2♂, 3♀ (SCAU, Nos 128377–81), Mulun, Huangjiang, Guangxi, 25°09'N, 108°01'E, alt. 449 m, 19.ix.2015, 26.vii.2015, YQ Liu; 1♂, 2♀ (SCAU, Nos 128382–84), Weng’ang, Libo, Guizhou, 25°13'N, 107°56'E, alt. 754 m, 16.ix.2015, L Zhu; 6♂, 7♀ (SCAU, Nos 128229–40, 128370), Menglun, Mengla, Yunnan, 24°41'N, 101°25'E, alt. 680 m, 17.iv.2007, HW Chen, JJ Gao; 10♂, 10♀ (SCAU, Nos 128209–28), Wangtianshu, Mengla, Yunnan, 24°41'N, 101°25'E, alt. 680 m, 22–25.iv.2007, 9.x.2012, HW Chen, JJ Gao. JAPAN: 1♂, 2♀ (SCAU, Nos 128201–03), Iriomote Island, Okinawa, 24°32'N, 123°88'E, alt. 150 m, 12.v.2001, HW Chen.
Paramere distally broadened and pubescent in lateral view (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements (range in 7♂, 3♀, in mm): BL = (2.73–3.20, 3.07–3.33), ThL = (1.29–1.42, 1.07–1.47), WL = (2.53–2.98, 2.87–3.07), WW = (0.93–1.07, 1.00–1.20).
Indices: arb = 4/3, avd = 0.94–1.06, adf = 0.40–0.80, flw = 2.00–2.50, FW/HW = 0.38–0.42, ch/o = 0.06–0.09, prorb = 0.60–0.74, rcorb = 0.20–0.33, vb = 0.83–1.25, dcl = 0.51–0.59, presctl = 0.31–0.44, sctl = 0.87–1.03, sterno = 0.57–0.69, orbito = 0.40–0.60, dcp = 0.36–0.48, sctlp = 0.86–1.00, C = 1.97–2.20, 4c = 1.00–1.20, 4v = 2.00–2.27, 5x = 1.92–2.20, ac = 2.27–2.92, M = 0.62–0.77, C3F = 0.90–0.94.
China (Taiwan, Guangdong, Hainan*, Guangxi*, Guizhou*, Yunnan), Japan* (Ryukyu Is.).
Holotype ♂ (SCAU, No. 128318): CHINA: Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 760 m, 23.iv.2007, HW Chen. Paratypes: CHINA: 2♂, 6♀ (SCAU, Nos 128319–26), HW Chen, JJ Gao, same data as holotype; 5♂, 8♀ (SCAU, Nos 128329–39, 128371, 72), Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 760 m, 9.v.2012, HW Chen, JJ Gao; 2♂ (SCAU, Nos 128327–28), Menglun, Mengla, Yunnan, 21°55'N, 101°16'E, alt. 570 m, 3–4.xi.2001, HW Chen.
Paramere distally curved ventrally, slightly acute apically (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements [holotype (paratypes range in 4♂, 5♀), in mm]. BL = 3.91 (3.16–3.96, 2.76–3.60), ThL = 1.82 (1.33–1.64, 1.29–1.64), WL = 3.20 (2.49–3.51, 2.40–3.16), WW = 1.38 (1.07–1.11, 1.11–1.33).
Indices: arb = 4/3 (4/3), avd = 1.22 (0.75–1.13), adf = 3.00 (2.67–4.00), flw = 1.67 (1.33–2.50), FW/HW = 0.57 (0.31–0.49), ch/o = 0.10 (0.10–0.18), prorb = 0.79 (0.55–0.78), rcorb = 0.57 (0.23–0.44), vb = 1.00 (0.50–1.00), dcl = 0.83 (0.57–0.95), presctl = 0.50 (0.43–0.52), sctl = 0.91 (0.91–1.29), sterno = 0.77 (0.64–0.92), orbito = 0.50 (0.50–1.00), dcp = 0.53 (0.44–0.53), sctlp = 0.88 (0.83–1.17), C = 2.12 (1.95–2.63), 4c = 1.13 (0.91–1.24), 4v = 2.17 (2.09–2.56), 5x = 1.88 (1.43–2.71), ac = 2.60 (2.10–2.93), M = 0.65 (0.59–0.91), C3F = 0.92 (0.82–0.96).
From the Latin word “maculatus” (= spotted), referring to the mesonotum with dark patch.
China (Yunnan).
Holotype ♂ (SCAU, No. 128297): CHINA: Baihualing, Baoshan, Yunnan, 25°17'N, 98°48'E, alt. 1400 m, 7.vi.2011, HW Chen. Paratypes: CHINA: 6♂, 10♀ (SCAU, Nos 128298–313), HW Chen, JJ Gao, same data as holotype; 2♂, 1♀ (SCAU, Nos 128314–15, 128373), Hesong, Menghai, Yunnan, 21°50'N, 100°05'E, alt. 1940 m, 16.iv.2010, 6.v.2012, HW Chen, JM Lu; 1♂ (SCAU, No. 128317), Menglun, Mengla, Yunnan, alt. 570 m, 3, 4.xi.2001, HW Chen.
This species is similar to S. rhina sp. n. in the male terminalia, but can be distinguished from the latter by having the paramere expanded and not divided distally in lateral view (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements [holotype (paratypes range in 4♂, 5♀), in mm]: BL = 3.60 (3.20–3.47, 3.33–3.78), ThL = 1.64 (1.42–1.64, 1.42–1.78), WL = 3.42 (3.02–3.33, 3.11–3.64), WW = 1.38 (1.20–1.38, 1.24–1.42).
Indices: arb = 4/3 (4/3), avd = 1.06 (0.83–1.11), adf = 2.57 (3.17–3.83), flw = 1.57 (1.57–2.00), FW/HW = 0.43 (0.38–0.45), ch/o = 0.12 (0.08–0.15), prorb = damaged (0.52–0.63), rcorb = damaged (0.25–0.29), vb = 1.20 (0.86–1.20), dcl = damaged (0.68–0.76), presctl = damaged (0.39–0.46), sctl = damaged (0.97–1.07), sterno = 1.23 (0.70–1.22), orbito = 0.56 (0.50–0.60), dcp = 0.56 (0.46–0.55), sctlp = 0.88 (0.88–1.00), C = 2.28 (1.94–2.16), 4c = 1.02 (0.98–1.24), 4v = 2.02 (1.85–2.32), 5x = 1.33 (1.29–1.73), ac = 2.30 (2.35–2.72), M = 0.53 (0.49–0.68), C3F = 0.91 (0.88–0.98).
A combination of the Greek words: “melas” (= black) + “gaster” (= abdomen), referring to the abdomen nearly black.
China (Yunnan).
Holotype ♂ (SCAU, No. 128253): CHINA: Baihualing, Baoshan, Yunnan, alt. 1400 m, 7.vi.2011, ex tussocks, HW Chen. Paratypes: CHINA: 1♂, 4♀ (SCAU, Nos 128248–51, 128374), HW Chen, JJ Gao, same data as holotype; 1♂ (SCAU, No. 128254), Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 580 m, 23.iv.2007, HW Chen.
This species is similar to S. nigripecta sp. n. in the shape of the paramere and the pattern on the mesonotum (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements [holotype (paratypes range in 2♂, 4♀), in mm]: BL = 3.38 (2.86–3.33, 2.86–3.29), ThL = 1.60 (1.47–1.64, 1.33–1.56), WL = 3.33 (3.20–3.29, 2.67–3.33), WW = 1.29 (1.20–1.24, 1.07–1.33).
Indices: arb = 4/3 (4/3), avd = 1.00 (0.88–1.43), adf = 2.67 (3.20–4.00), flw = 1.67 (1.83–3.00), FW/HW = 0.42 (0.41–0.47), ch/o = 0.13 (0.05–0.13), prorb = damaged (0.46–0.64), rcorb = damaged (0.27–0.36), vb = 1.00 (0.50–1.00), dcl = 0.77 (0.55–0.69), presctl = 0.44 (0.28–0.43), sctl = damaged (0.88–1.18), sterno = 0.73 (0.56–0.92), orbito = 0.56 (0.44–0.56), dcp = 0.47 (0.40–0.50), sctlp = 0.94 (0.86–1.00), C = 2.11 (2.20–2.59), 4c = 1.23 (0.90–1.18), 4v = 2.15 (2.11–2.29), 5x = 1.80 (1.67–2.20), ac = 2.37 (2.43–2.57), M = 0.68 (0.50–0.65), C3F = 0.96 (0.89–0.96).
A combination of the Latin words: “niger” + “costa”, referring to the black pleura.
China (Yunnan).
Holotype ♂ (SCAU, No. 128264): CHINA: Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 760 m, 22.iv.2007, HW Chen. Paratypes: CHINA: 4♂ (SCAU, Nos 128265–68), Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 760 m, 22.iv.2007, 9.v.2012, HW Chen.
This species is similar to S. protenipenis sp. n. in the aedeagus with pubescence (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Measurements [holotype (paratypes range in 4♂), in mm]: BL = 2.80 (2.58–2.76), ThL = 1.20 (1.20–1.24), WL = 2.49 (2.40–2.71), WW = 0.89 (0.93–1.02).
Indices: arb = 4/3 (4/3), avd = 0.94 (0.86–0.95), adf = 3.60 (3.40–3.80), flw = 1.60 (1.80–2.00), FW/HW = 0.43 (0.30–0.41), ch/o = 0.09 (0.07–0.12), prorb = 0.59 (0.57–0.71), rcorb = 0.27 (0.32–0.33), vb = 1.00 (1.00–1.17), dcl = damaged (0.62–0.70), presctl = damaged (0.31–0.40), sctl = damaged (0.96), sterno = damaged (1.00–1.05), orbito = 0.50 (0.50–0.63), dcp = 0.46 (0.39–0.50), sctlp = 0.92 (0.85–0.92), C = 1.77 (1.71–1.80), 4c = 1.26 (1.25–1.31), 4v = 2.17 (2.20–2.25), 5x = 2.00 (1.80–2.00), ac = 3.55 (2.71–3.75), M = 0.65 (0.64–0.70), C3F = 0.87 (0.80–0.92).
A combination of the Latin words: “niger” + “pectus”, referring to the black thorax.
China (Yunnan).
Holotype ♂ (SCAU, No. 128347): CHINA: Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 760 m, 9.v.2012, HW Chen. Paratypes: CHINA: 1♂ (SCAU, No. 128348), same data as holotype; 20♂, 15♀ (SCAU, Nos 128349–368), Menglun, Mengla, Yunnan, 21°55'N, 101°16'E, alt. 570 m, 3–4.xi.2001, HW Chen; 1♂ (SCAU, No. 128369), Hesong, Menghai, Yunnan, alt. 1940 m, 6.v.2012, HW Chen.
This species differs from the other known species of this group in having the paramere with a hook-shaped projection basoventrally (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements [holotype (paratypes range in 6♂, 1♀), in mm]: BL = 3.47 (2.93–3.42, 3.42), ThL = 1.60 (1.38–1.60, 1.64), WL = 2.98 (2.71–2.98, 3.11), WW = 1.16 (1.07–1.20, 1.24).
Indices: arb = 4/3 (4/3), avd = 0.95 (0.94–1.05), adf = 3.50 (3.29–4.00), flw = 1.67 (1.67–2.00), FW/HW = 0.38 (0.38–0.43), ch/o = 0.09 (0.05–0.12), prorb = 0.65 (0.32–0.63), rcorb = 0.23 (0.19–0.38), vb = 1.00 (0.83–1.00), dcl = damaged (0.58–0.73), presctl = damaged (0.23–0.42), sctl =0.88 (0.92–1.06), sterno = 0.65 (0.59–0.85), orbito = 0.50 (0.46–0.67), dcp = 0.43 (0.40–0.46), sctlp = 0.93 (0.88–1.07), C = 2.20 (1.98–2.30), 4c = 1.03 (1.00–1.21), 4v = 1.98 (1.88–2.26), 5x = 1.77 (1.69–2.00), ac = 2.16 (2.10–2.73), M = 0.58 (0.60–0.69), C3F = 0.83 (0.84–0.93).
From the Latin word “obscurata” (= dark), referring to the thorax dark.
China (Yunnan).
Holotype ♂ (SCAU, No. 128269): CHINA: Hesong, Menghai, Yunnan, alt. 1940 m, 6.v.2012, HW Chen. Paratypes: CHINA: 6♀ (SCAU, Nos 128270–75), HW Chen, JJ Gao, same data as holotype; 12♂, 19♀ (SCAU, Nos 128277–95, 128375), Hesong, Menghai, Yunnan, alt. 1940 m, 16.iv.2010, K Liu, JM Lu, ZF Shao, SJ Yan; 1♂ (SCAU, No. 128276), Baihualing, Baoshan, Yunnan, alt. 1400 m, 7.vi.2011, HW Chen, JJ Gao.
Paramere apically divided into two round lobes in lateral view (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements [holotype (paratypes range in 5♂, 4♀), in mm]: BL = 3.33 (3.16–3.51, 3.33–3.38), ThL = 1.60 (1.56–1.69, 1.60–1.73), WL =3.42 (3.16–3.33, 3.33–3.51), WW = 1.38 (1.29–1.38, 1.33–1.47).
Indices: arb = 4/3 (4/3), avd = 1.00 (0.90–1.00), adf = 3.17 (2.17–3.80), flw = 1.83 (1.43–2.20), FW/HW = 0.41 (0.40–0.44), ch/o = 0.10 (0.09–0.13), prorb = 0.62 (0.50–0.63), rcorb = 0.31 (0.27–0.40), vb = 1.00 (0.67–1.20), dcl = damaged (0.67–0.72), presctl = 0.51 (0.37–0.47), sctl = damaged (0.98–1.15), sterno = 0.73 (0.66–0.79), orbito = 0.56 (0.50–0.60), dcp = 0.46 (0.46–0.53), sctlp = 0.94 (0.81–1.00), C = 1.98 (1.86–2.33), 4c = 1.11 (1.02–1.23), 4v = 2.04 (2.00–2.28), 5x = 1.44 (1.32–1.67), ac = 2.78 (2.21–2.79), M = 0.51 (0.52–0.63), C3F = 0.92 (0.88–0.96).
A combination of the Latin words: “protensus” + “penis”, referring to the protruded aedeagus.
China (Yunnan).
Holotype ♂ (SCAU, No. 128255): CHINA: Menglun, Mengla, Yunnan, 21°55'N, 101°16'E, alt. 570 m, 3, 4.xi.2001, HW Chen. Paratypes: CHINA: 7♀ (SCAU, Nos 128256–61, 128376), same data as holotype; 1♂ (SCAU, No. 128263), Baihualing, Baoshan, Yunnan, alt. 1400 m, 7.vi.2011, HW Chen.
This species differs from the other species of the brunnea group in the mesonotum being yellowish brown, lacking a longitudinal stripe (Fig.
Male and female: Head (Fig.
Thorax (Fig.
Abdomen (Fig.
Male terminalia (Fig.
Female terminalia (Fig.
Measurements [holotype (paratypes range in 1♂, 1♀), in mm]: BL = 3.33 (3.42, 3.33), ThL = 1.51 (1.60, 1.60), WL = 3.20 (3.20, 3.24), WW = 1.29 (1.20, 1.29).
Indices: arb = 4/3 (4/3), avd = 0.83 (0.80–0.95), adf = 3.00 (3.00–3.80), flw = 1.67 (1.67–1.83), FW/HW = 0.43 (0.42–0.43), ch/o = 0.11 (0.11) , prorb = damaged (damaged), rcorb = 0.31 (damaged), vb = 1.00 (1.00–1.17), dcl = 0.75 (0.64), presctl = 0.40 (0.43), sctl = damaged (damaged), sterno = 0.71 (0.73), orbito = 0.56 (0.44–0.56), dcp = 0.45 (0.47), sctlp = 0.93 (0.88), C = 2.14 (2.10–2.15), 4c = 1.07 (1.02–1.10), 4v = 2.12 (2.07–2.24), 5x = 1.67 (1.79–1.80), ac = 2.44 (2.39–2.56), M = 0.61 (0.60–0.64), C3F = 0.96 (0.91–0.96).
From the Greek words: “rhnios”, referring to the facial carina large and prominent.
China (Yunnan).
Scaptodrosophila parabrunnea (Tsacas & Chassagnard, 1976). A, B epandrium (epand), surstylus (sur) and cercus (cerc) (lateral and posterior views) C, D hypandrium (hypd), parameres (pm), gonopods (gon), aedeagus (aed) and aedeagal apodeme (aed a) (ventral and lateral views). Scale bars 0.1 mm.
1 | Body brown; carina large; arista exceptionally large, with 4–5 curved long dorsal branches and 3 ventral branches in addition to terminal bifurcation (Figs |
brunnea group...2 |
2 | Hypandrium lacking pubescence medially (Figs |
3 |
– | Hypandrium pubescent medially (Figs |
4 |
3 | Mesonotum yellowish brown, with four brown longitudinal stripes sublaterally (Fig. |
S. melanogaster sp. n. |
– | Mesonotum yellowish brown, lacking longitudinal stripe (Fig. |
S. rhina sp. n. |
4 | Aedeagus pubescent ventrally (Figs |
5 |
– | Aedeagus lacking pubescence (Figs |
7 |
5 | Mesonotum brown, with two yellowish brown longitudinal stripes submedially (Fig. |
S. nigripecta sp. n. |
– | Mesonotum yellowish brown, with three or four longitudinal stripes (Figs |
6 |
6 | Mesonotum yellowish brown, with four brown longitudinal stripes (Fig. |
S. protenipenis sp. n. |
– | Mesonotum yellowish brown, with three dark brown longitudinal stripes medially and sublaterally (Fig. |
S. nigricostata sp. n. |
7 | Mesonotum yellowish brown, with a brownish longitudinal stripe (Fig. |
8 |
– | Mesonotum brown, with two or three brownish longitudinal stripes (Figs |
9 |
8 | Mesonotum with a longitudinal stripe on 1/3 posterior (Fig. |
S. pressobrunnea (Tsacas & Chassagnard) |
– | Mesonotum yellowish brown, with a brown longitudinal stripe medially (Fig. |
S. parabrunnea (Tsacas & Chassagnard) |
9 | Mesonotum brown, with three yellowish brown longitudinal stripes (Fig. |
S. scutellimargo (Duda) |
– | Mesonotum brown, with two yellowish brown longitudinal stripes (Figs |
10 |
10 | Frons brown and glossy (Fig. |
S. obscurata sp. n. |
– | Frons brownish and dull (Fig. |
S. maculata sp. n. |
The specimens identified as S. pressobrunnea and S. scutellimargo putatively in this study mostly match the original descriptions, especially in the male terminalia described and illustrated by
The integration of morphological and DNA-based approaches has revealed an effective way to improve accuracy for species identification (
It is noteworthy that no “simple pure character” is found for S. maculata sp. n. in the character-based analyses, and the smallest interspecific distance in the brunnea group is detected between S. maculata sp. n. and S. parabrunnea (3.3%), which is above the 3% (or 2%) sequence divergence threshold (
We wish to thank Dr. Jianjun Gao (Yunnan University, China) and all the members of our laboratory (SCAU) for helping us in all the fieldwork. This work was supported by the National Natural Science Foundation of China (Nos 31672321, 31093430).